Edward salomon bebglitnd



E. S. BERGLUND.

APPARATUS FOR PREVENTING SINTRING IN ELECTRIC FURNACES.-

APPLICATION FILED APR. 21.1915.

Patented Aug. 29; 1916.YYY

`UNITED sTATEs PATENT onirica EDWARD SALOMON BERGLUND, OF TBOLLHTTAN, SWEDEN.

APPARATUS FOR PREVENTING SINTERING- IN ELECTRIC FURNACES.

Application filed April 21, 1915.

To all whom t may concern:

Ee it known that I, EDWARD SALOMON BERGLUND, engineer, residing at Trollhittan, Sweden, have invented certain new and useful'lmprovements in Apparatus for Preventing Sintering in Electric Furnaces, of which the following is a specification.

The known method of introducing the charge in a furnace through a vertical shaft, having a smaller sectional area than the sectional area of the smelting chamber of the furnace, has for its object to enable the charge to descend automatically corresponding to the consumption, the quantity of the charge consumed being automatically compensated by the descent of the charge in the shaft.

The present invention has for its object to promote said automatic introduction of the charge by providing means for preventing the charge from sintering or suspending at the place where the shaft opens into the furnace chamber, which has shown to take place very often when employing a vertical shaft and which disturbs thesautomatic descent of the charge.

The invention consists in providing means for imparting motion to the charge in the furnace chamber in addition to the motion of the charge caused by its introduction into the furnace through the above-mentioned relatively small feed shaft, so that sintering of the charge at the opening of the feed shaft into the furnace chamber is prevented.

The drawing shows in vertical section an electric furnace constructed in accordance with the invention, said furnace being intended for extracting volatile metals, such as Zinc, from its ores, by means of electric treatment.

Specification of Letters Patent.

Patented Aug. 29, 1916.

Serial No. 22,782.

l indicates the furnace chamber, in the upper part of which the shaft 2 opens. In the furnace wall an opening 3 is provided, through which partof the charge is introduced in the furnace from the hopper 5 by means of the screw 4:.

6 indicates an opening for the escape of the gases, and 7, S the electrodes.

The charge introduced through the shaft 2 in form of powder, bricks or pieces. places itself along an inclination 9 in tbe furnace chamber and descends according to its consumption by the electric treatment. The introduction of the auxiliary charge by` means of the screw 4 establishes a. movement of the charge in the shaft 2 or in the furnacelchamber, whereby the sintering or suspension of the same is avoided.

Having now particularly described my invention what I declare as new is:

In an electric furnace, the combination with the furnace chamber and a feed shaft having less sectional area than the sectional area of the furnace chamber and through which the main charge is fed by gravity,

of means for introducing and mechanically EDWARD SALOMON BERGLUNI). y

Witnesses HUGO LINDBERG, BRUH ONSELL. 

